What about this one?
My father, the herdsman, wanted to give me half of his herd to me with the condition that I didn't kill any one of the sheep.
It turned out he just had only one sheep. So I borrowed another sheep from a neighbour. Half of the two sheep is now only one sheep which I kept, and returned the other one to the neighbour.
The question is - who has the other half of the herd?
If there was no neighbour and I just drew a sheep on a piece of paper, symbolizing one sheep. Could I do the same thing anyway? Keeping half of the herd, i.e. one sheep? Is the other sheep really necessary?
What would my father say when half of his herd now is drew on a piece of paper?